[clang] [Clang] [Sema] Allow non-local/non-variable declarations in for loop (PR #129737)

[via cfe-commits]

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@@ -10794,6 +10794,23 @@ def err_non_local_variable_decl_in_for : Error<
   "declaration of non-local variable in 'for' loop">;
 def err_non_variable_decl_in_for : Error<
   "non-variable declaration in 'for' loop">;
+
+def ext_c23_non_local_variable_decl_in_for : Extension<
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Sirraide wrote:

> You should remove the error diagnostics because they're no longer used.

Well, they *are* still used for C++ range-based for loops and for whatever an `ObjCForCollectionStmt` is.

https://github.com/llvm/llvm-project/pull/129737